It's completely unrelated to M1 and also affecting Mojave and Catalina, apparently. It's a security signature check service problem. Some might argue that it should be easy to disable security signature checks, system wide (which is what the provided instruction achieve). Many more would probably argue that disabling these checks would be bad for security, especially for the average user.
I'm curious what security researchers think of this. Further evidence that security is a doomed endeavor, since it's necessarily at odds with convenience?